Question

660. Remove 9

中文文档

Description

Start from integer 1, remove any integer that contains 9 such as 9, 19, 29...

Now, you will have a new integer sequence [1, 2, 3, 4, 5, 6, 7, 8, 10, 11, ...].

Given an integer n, return _the_ nth (1-indexed) integer in the new sequence.

 

Example 1:

Input: n = 9
Output: 10

Example 2:

Input: n = 10
Output: 11

 

Constraints:

• 1 <= n <= 8 * 108

Solutions